I normally have my passcode required setting at 4 hours. Today, I noticed it was requiring it more frequently. Well, I go to the settings, and I see it's now set for 1 hour. But here's the kicker: The 4 hour option is NO LONGER THERE. What happened? My wife has a iPhone4S running iOS 5.0 identical to mine, and she still has the 4 hour setting. Where did it go and can I bring it back?